In a medium-sized microwave safe container, heat cookie butter, milk chocolate peanut butter cups and butter for 30 seconds. Stir. Continue to microwave and stir in 30 second intervals until sauce is fully melted. Pour Puffins in a large bowl and add sauce over the top, gently folding the mixture until the cereal is well coated. Toss cereal with powdered sugar in the bowl, OR pour the cereal into a resealable food storage plastic bag with the powdered sugar and shake. Spread cereal on a cookie sheet to dry. You may want to toss cereal with more powdered sugar after it cools. Mix in Chocolate Sunflower Seed Drops and enjoy! Store in a closed container in the refrigerator.